libcryfs/implementations/inmemory/InMemoryBlockStore.cpp

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#include "InMemoryBlock.h"
#include "InMemoryBlockStore.h"
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#include <memory>
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using std::unique_ptr;
using std::make_unique;
using std::string;
using std::mutex;
using std::lock_guard;
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using std::piecewise_construct;
using std::make_tuple;
using cpputils::Data;
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namespace blockstore {
namespace inmemory {
InMemoryBlockStore::InMemoryBlockStore()
: _blocks() {}
unique_ptr<Block> InMemoryBlockStore::tryCreate(const Key &key, Data data) {
auto insert_result = _blocks.emplace(piecewise_construct, make_tuple(key.ToString()), make_tuple(key, std::move(data)));
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if (!insert_result.second) {
return nullptr;
}
//Return a pointer to the stored InMemoryBlock
return make_unique<InMemoryBlock>(insert_result.first->second);
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}
unique_ptr<Block> InMemoryBlockStore::load(const Key &key) {
//Return a pointer to the stored InMemoryBlock
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try {
return make_unique<InMemoryBlock>(_blocks.at(key.ToString()));
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} catch (const std::out_of_range &e) {
return nullptr;
}
}
void InMemoryBlockStore::remove(unique_ptr<Block> block) {
Key key = block->key();
block.reset();
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int numRemoved = _blocks.erase(key.ToString());
assert(1==numRemoved);
}
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uint64_t InMemoryBlockStore::numBlocks() const {
return _blocks.size();
}
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}
}